SOC (State of Charge) detection method and system for vanadium redox battery

The invention discloses an SOC (State of Charge) detection method and system for a vanadium redox battery. The method comprises the following steps: measuring the positive potential of positive electrolyte and the negative potential of negative electrolyte of the vanadium redox battery; acquiring the positive potential and the negative potential, filtering and amplifying the positive potential and the negative potential, and converting the filtered and amplified positive potential and negative potential into a positive potential digital signal and a negative potential digital signal respectively; processing the positive potential digital signal and the negative potential digital signal to generate a positive SOC value and a negative SOC value respectively; displaying the positive SOC value and the negative SOC value. The SOC detection method and system for the vanadium redox battery in the embodiment of the invention are reasonable in design, are convenient in operation, are accurate in detection and are small in errors; guidance can be provided for the maintenance and management work of long-time-running vanadium electric pile electrolyte, and safe and stable running of an electric pile is ensured.